How to Fix Galaxy S26 Mobile Data Not Working After Update

Galaxy S26 Mobile Data Not Working After Update is usually caused by update-related setting changes, damaged caches, or a service that failed to reload properly after the latest software install.

For related help, also see How to Fix Galaxy S26 Texting Problems, How to Fix Galaxy S26 WiFi Keeps Disconnecting After Update, How to Fix Galaxy S26 Black Screen After Update, and the Galaxy S26 hub.

Method 1: Toggle Airplane Mode and reboot

A radio stack glitch after the update can prevent the phone from attaching to mobile data properly.

1. Turn Airplane mode on for 30 seconds, then turn it off.
2. Restart the phone.
3. Test mobile data with Wi-Fi disabled.

Method 2: Confirm the correct SIM or eSIM is set for data

Dual-SIM and eSIM users can lose data if the update changes the preferred line.

1. Open Settings > Connections > SIM manager.
2. Make sure the intended line is selected for Mobile data.
3. Disable the secondary line temporarily and retest if needed.

Method 3: Reset the APN to carrier defaults

Wrong APN values can block LTE and 5G data even if signal bars are present.

1. Go to Settings > Connections > Mobile networks > Access Point Names.
2. Open the menu.
3. Choose Reset to default.

Method 4: Re-select network mode

If the update forced the wrong network type, data may stop working or stay stuck on a weak connection.

1. Open Settings > Connections > Mobile networks.
2. Tap Network mode.
3. Use the recommended automatic 5G/LTE setting for your carrier.

Method 5: Reset network settings

This removes damaged carrier and radio settings without erasing personal files.

1. Go to Settings > General management > Reset.
2. Tap Reset network settings.
3. Reconnect and test data again.

Method 6: Update carrier services and system software

A newer build may already contain a modem fix for the issue.

1. Install any pending Galaxy Store system updates if offered.
2. Then open Settings > Software update > Download and install.
3. Install the latest patch and restart the phone.

Method 7: Reseat the SIM or refresh the eSIM line

A line refresh can fix data registration when calls or texts work but the internet does not.

1. Power off the phone.
2. Remove and reinsert the physical SIM, or toggle the eSIM line off and back on.
3. Boot the phone and test data again.

Method 8: Ask your carrier to reprovision the line

If signal bars are normal but data still fails, your account provisioning may need a reset.

1. Contact your carrier support.
2. Ask them to refresh the SIM or eSIM provisioning.
3. Mention that the problem started right after the latest software update.

If the problem continues after all of the steps above, visit the main Galaxy S26 page for more troubleshooting guides.